不同方法制备的高纯SiO_2纤维的结构及其形成  

STRUCTURE AND ITS FORMATION OF HIGH PURITY SILICA FIBERS MADE BY DIFFERENT METHODS

作　　者：周万城[1] 傅恒志[1] 张立同[1] 徐培苍[1] 王永强[1] 王志海[1] 

机构地区：[1]西北工业大学,西安地质矿产研究所

出　　处：《硅酸盐学报》1995年第5期565-570,共6页Journal of The Chinese Ceramic Society

摘　　要：用Ｒａｍａｎ光谱和Ｘ射线径向分布函数研究了高纯石英熔融法、酸沥滤法和溶胶－凝胶法三种不同方法制取的高纯ＳｉＯ＿２纤维的结构。结果表明，不同方法制备的ＳｉＯ＿２纤维中的断键数目相差很大，并且都远高于块状石英玻璃，断键上连接的原子团也与制备方法有关。径向分布函数表明，沥滤法纤维中存在一种Ｓｉ－Ｏ－Ｓｉ连接，其Ｓｉ－Ｓｉ原子间距分布于近邻Ｓｉ与次近邻Ｓｉ之间。结合不同制备方法的特点对各种纤维结构的形成机理进行了讨论。The structure of silica fibers made by high-purity quartz fusion method,acid leaching method, and sol-gel method was studied by using Raman spectroscopy and X-ray radial distribution function (RDF).Both test results indicate that the amount of broken bonds in the above t hree kinds of fibers is different nbvi-ously,and is much more than that of a fused bulk silica glass. The atoms connected the broken bonds are differ-ent from those made by different methods. RDF indicates that there exists a specified atom-atom spacing in theacid leached fihar, which distributes between the nearest Si-to-Si spacing and the second nearest Si-to-Sispacing,The formation processes of the structure are discussed.

关 键 词：二氧化硅纤维 制备 结构 玻璃纤维 形成机理 

分 类 号：TQ171.77[化学工程—玻璃工业]